Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46c29064db4406b…

MALICIOUS

PDF

95.6 KB Created: 2021-02-18 07:20:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9c3fb382adb9b6628d9d4b07167ff844 SHA-1: 10c22542d3e1e7a0e977ed906e8bd86b09d5563e SHA-256: d46c29064db4406bf7cd8f611412a7a9a173b5ba563a85620965eb544ab4951e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, which is characteristic of phishing or scam operations. The PDF structure and embedded content suggest it's designed to lure users into clicking these links, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/123?utm_term=plato+five+dialogues+apology+summary PDF link annotation
    • http://bluebadgeapproval.com/85129045452nzpte.pdfIn PDF document text
    • http://winoraama.website/97004173109hj88o.pdfIn PDF document text
    • https://wamibujobaju.weebly.com/uploads/1/3/4/7/134716207/e1bf3f540a.pdfIn PDF document text
    • https://cdn.sqhk.co/libodinidep/jbhgmPf/underhand_barbell_row_vs_overhand.pdfIn PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/7692043.pdfIn PDF document text
    • http://fobimuwoxik.iblogger.org/clasificacion_taxonomica_de_los_animales_domesticos.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/Yjie7hb/gavazutokapisafof.pdfIn PDF document text
    • http://chebsvet.ru/ge_dehumidifier_50_pint_adel50lrl26ercq.pdfIn PDF document text
    • http://cleaner-inn.club/46761140116wyhe2.pdfIn PDF document text
    • https://panesiwosejel.weebly.com/uploads/1/3/0/7/130739396/7911196.pdfIn PDF document text
    • http://clientesdkb.com/algebraic_expression_tutorialr61pl.pdfIn PDF document text
    • http://ottics.ru/legal_dictionary_french_english11zt3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://levasufut.rf.gd/30290512441.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13326 5524 bytes
SHA-256: 4e0c9c70327adc89737c0e1343599e2baf2fdaf6bd1ef5069f0ba854564fa5d2
font_01_sfnt_off000145f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145F6 13576 bytes
SHA-256: 5eeaf225849c37926cbb4c9aa079eb16928636c4e34531bfa7d53c0eb7960e6d

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